Machine for making radiator tubes



Oct. 30, 1923. '1,472,719

G. HORVATH l 'MACHINE FOR MAKING RADIATOR TUBES Fi d June 9, 1919 l2 Sheets-Sheet l ff@ j' J1 a' N n @noauto/a 6272/6' //0/21//WW.

Oct'. 30, 1923.

G HORVATH MACHINE FOR MAKING RADIATOR TUBES witness z Oct. 30,1923. v

G. HORVATH MACHINE FOR MAKING RADIATOR TUBES Filed June 9, 1919 12 Sheets-Sheet 5 "mulini:

um lum Oct. 30, 1923.

. G. HoRvATl-i MACHINE FOR MAKING RADIATOR TUBES 12 Sheets-Sheet L Z'Z/S? bhw/77%.

Filed June 9 1919 @vih/woo Oct. 30, 1923.

1,472,719 G. HORVATH MACHINE FOR MAKING RADIATOR TUES Filed June 9, 1919 l2 Sheets-Sheet 5 @nvm/Lto@ Oct. 30, 1923.

G. HORVATH MACHINE FOR MAKING RADIATOR TUBES l2 Sheets-Sheet 6 Filed June 9 1919 a ayu/w13 Oct. 30, 1923. 1,472,719

G. HoRvA-rH MACHINE FOR MAKING RADIATOR TUBES Filed June 9, 1919 l2 Sheets-Sheet 7 qui Oct. 30,1923. 1,472,719 G. HORVATH MACHINE FOR MAKING RADIATOR TUBES Filed Jun@ f, 1919 12 sheetfsheet 8 Oct. 30, 1923.

1,472,719 G. HORVATH MACHINE FOR MAKING RADIATOR TUBES Filed June 9, 1919 l2 Sheets-Sheet 9 CCL 30, 1923..

G. HORVATH MACHINE FOR MAKING RADIATOR TUBES Filed June 9, 1919 l2 Sheets-Sheet 10 6m) Hmmm @pz/7 Ha? www.

, flbtoznsg Oct. 30, 1923.

G. HORVATH MACHINE FOR MAKING RADIATOR TUBES Filed June H. 1919 l2 Sheeheet l] 51mm ntoz w Qa l attenua? Oct. 30, 1923.`

G. HORVATH MACHINE FOR MAKING RADIATOR TUBES Filed June 9, 1919 l2 Sheets-Sheet 13 lllll Patented Oct. 30, 19.23.

r.fratrrvl OFFICE.

enzn'nonvarn, or DETROIT, MICHIGAN.

. MACHLINE FOR MAKING RADIATOR TUBES.

Apucauon med rune 9, 1919. semi No. 302,779.

To all whom t may concern:

' Be it known that I, GEZA 'HoRvA'rI-I, a citizen of the 'United States, residing at Detroit, in the county of Wayne and State of Michigan, have invented Acertain new and useful Improvements in Machines for Making Radiator Tubes, of which the following is a specificatiomreference being had therein to the accompanying drawing. g

This invention relates to machines` for making radiator -tubes which .have extended radiating surfaces made of -a strip or ribbon of thin sheet metal wound spirally around the tubeproper, the object being to provide amachine which is very compact in form'into whichthetube is' fed and rotated in such a mannerjthat a strip of thin l -metal-will be wound Aaroundthe tube and metal is fed between a pairof plaiting rolls secured thereon all in one operation.

Another andA furtherI object ofthe inventionis to provide a machine which is' so constructed that the ribbonl of thin sheet to thetube lby solder in order to produce aA strong radiatorstube. .K A

-Another and further object of the invention is toprovide a machine with novel.

- means for feeding' the' tube forward while the same is being rotated so that lthe ribbon -the machine.

the tube.

-A stillffurther object of-the invention is of thin metal can be placed4 or wound upon `to provide novel means for applying.acidv y' to the tube and strip of ribbon before ity reaches the solder bath.

Another land further object vof the invention is to provide novel means for'applyingr ll solderv to the entire surface of the tube and stripv in order to lgive the same a coating,` means being provided for blowing the surplus solder therefrom before the tube leaves A still-further object of the-invention is to provide a machine which has a capacity of turning out radiatorftubes much quicker thanv prior constructions of machines', the

tube being rotated at approximately nine hundred. 44revolutions vper minute, and yas herein shown lthe colls have 4a. pitch or en- Fig.` 2 is a 'top plan' view circle the tube six per inch so that twelve feet of tubing can be formed per minute.

Another and further object of my invention is to provide a machine' by means of which the radiator tube can be formed continuously as by connecting the ends of the tubes as they are 'forced 1nto the machine,

a continuous tube will be formed which canv be cut the desired length after it leaves the machine, and it Will-be seen that withlthe construction of machine herein shown and 4in practice I have found thatby providing .a coupling lmember an additional tube can "be joined to the ,end ofthe tube passing through' lthe machine so 'that in reality a be formed.4 y Y Another and further object vof the invention is .toprovide'novel means for driving the feeding and revolving means so as to cause .continuous tube -havinga 'helical flange will the same-to rotate at different rates of speed.

Other and further objects andy advantagesof the invention will be hereinafter set Aforth and the novel features thereof defned by the appended claims.

. In'thedrawl-ngs- Figure 1-1s .a sidesame. l

A of the machine. Fig; 3 is an end'ele'vation.

elevation of amachine l l constructed accordance 'with ,my inven- 'tion showing a tube passing. through the Figi is a horizontal section showing the gripping Jand feeding rollersand the gearing'for driving the same. i

l Fig..5 is avertic'al sectiontaken on line 5 5 of Fig; 2.

Fig. 6 -isl a vertical section takenon line .6 6 of Fig. 2.,

. Fig.y 7 is a vertical section taken on-line 7 7 of Fig. 2. v' Fig. -8 is la detailed vertical `section through vthe housing showing the feeding rollers and the counterbalancing weights for overcoming' centrifugal force.

F'g. v9 is a detailed elevation of`the gripping rollers, and .counterbalancirig weights. Fig, 10 is a top plan view of the same.

Fig. l1 is an elevation ofone end of the. housing.

Fig. -12 is a sectiontaken on line 1,2 12 v of Fig. 111.

j which one en turns freely in the coupling member 5.

Fig. 13 is an elevation of the intermediate section of the housing.

Fig. 14 is a section taken on line 14--14 of Fig. 13. j Fig. is an end elevation of the other end section of the housing. I y

Fig. 16 is a section taken on the line 16- 1e of Fig. 15.

Fig. 17 is a section taken on the line 17- 17 of Fig. 8.

Fig. 18 is an elevation of one of the arms carrying the counterbalancing weigths for the gripping rolls.

Fig.l 19 is a plan view of the same.

Fig. is an elevation of one of the arms carrying the counterbalancing weights for the feed rollers.

Fig. 21 is a plan view of the same.

Fig. 22 is an elevation of the plaiting rolls showing a flat strip of sheet metal in position to be fed between the same.

Fi 23 is a detail view `partly in section showing the plaiting rolls plaiting a strip las the tube is revolved so as to form a helical flange of 'thin sheet metal on the tube to provide an extended radiating surface.

Fig. 24 is a'detailed elevation of the acid applying brushes. i

. Fig. is a detailed perspective view of one of the brushes detached.

Fig. 26 s a large vertical section through the solder vat showing the solder applying means.

Fig. 27 is a detailed perspective of the ribbon showing how the same is plaited along one edge to take-up the material and to enable the same to be wound spirally on a tube, an

28 is a detailed view partly in section of a radiator tube formed in my machine. f

In the drawings 1 indicates a stand on which is mounted a base'2 having suitable journal bearings 3 and 4. Mounted in the journal bearin 3 is a coupling member 5 in of a shaft 6 is secured by pin 7, said shaft having its other end 'journaled in the bearing 4 and provided with a gear 8 meshing with a gear 9 mounted on a stud shaft 10 journaled in a suitable bearing formed on the base 2 below the bearing '4.

he coupling member 5 is provided with an integral gear 11 having a conical socket to receive a conical clutch member 12 which is keyed on a drive shaft 13 the end of which The clutch memberl is operated by the ordinary clutch shifting mechanism- 14 through the medium of a hand lever 15 which is clearly shown in Figs. 2 and 4. By this construction the shaft 6 can be driven from the driving shaft 13 through the medium of the clutch. `The, drive shaft 13 has a pulley 16 over which is adapted to pass a drive belt 16 extending fromn a motor, but it is of course understood that any kind of driving means can be employed for driving the driving shaft, and in practice I preferably employ an electric motor, but 0f course I do not wish to limit myself to any particular manner of driving the shaft.

lhe stand has an arm 17 extending therefrom provided with a bearing 18 for the end of the drive shaft 13 and said shaft has a worm wheel 19 which meshes with a worm 20 carried by shaft 21 journaled in an arm 22 which is pivotally mounted on the shaft 13. The other end of the shaft 21 carries a worm 23 which meshes with worm wheel 24 having hub portions 25 which are journaled in suitable bearings 26 as clearly shown in Fig. 1, said worm wheel traveling in an oil receptacle 27 for keeping the saine thoroughly lubricated. The worm wheel 19 also travels in an oil cup 28 for keeping the worm wheel and worm lubricated. The free end of the arm 22 extends through a pivoted yoke 29 which has arranged therein a coiled spring 30 which normally has a tendency to move the arm upwardly so as to move the worm 23 out of mesh with -the worm wheel 24, the armbeing heldin ad justed position by a cam 31 carried by a shaft 32 which 1s provided with a hand' lever 33, as shown in Fig. 1 and in the position shown in this figure the arm is held down against the tension of the spring which holds the worm 23 in mesh with the worm wheel 24 soas to drive the Worm 24 for the purpose hereinafter fully described.

The stud shaft 10 carries a gear 34 which meshes with an idle gear 35 adjustably mounted in the arm 36 pivotally mounted on the stud shaft 10, said arm having a slotted extension 37 through which a locking screw 38 is adapted to pass for locking thc arm in ad'usted position so that the gears 34 and 35 will be in mesh. By this construction different size gears 35 can be used for increasing or decreasing the speed of the machine as will be hereinafter fully described.

Arranged on'the base 2 of the machine are journal bearings 39 and 40 which are preferably intransverse 'alignment with the bearings 3 and 4, as shown in Figs. 1 and 4. Mounted within the journal bearing 40 is a sleeve 4l which has at its outer end an ex ternal gear 42 adapted to mesh with the gear 35 and at its inner end an internal that when the drive shaft 13 is rotated the drum will be revolved. The end section 46 a tubeguide 50 into which the tube is fed.

The end section 46 of the drum carries a stud shaft 51 having a pinion 52 mounted on its outer end which meshes with the internal gear 43 of the sleeve 41 which is driv en thro-ugh the medium of the gears 34, 35 and 42,' whereby the stud shaft 51 can be revolved atv any speed desired for the purpose hereinafter fully described. The stud shaft 51 carries a Worm 53 which is adapted to mesh with worm wheels 54 and 55 mounted on shafts 56 and 57 which aremounted in pivoted arms 58 carried by the intermediate section 45, the free ends of' the shafts 56 and 57 being connected together by coiled springs 59. The shafts 56 and 57 carry feed -rollers 60 and 61which are connected to the worm wheels 54 and 55 and the roller 61 is provided ywith side ianges 62 extending down over the roller 61. The faces of these rollers are provided with transverse ribs for gripping the tube and feeding the same through the machine. -By referring to Figs. 4 and6 it is seen that the rollers are disposed in longitudinal alignment with the tubular stem 49 so vthat as the tube is fed through the guide it will be gripped by the yfeeding rollers' and carried through the machine.. Asthe drum is revolving ata high rate of speed centrifugal force 4has a tendency to force the feed rollers outwardly,

' and in order to overcome the centrifugal \force I provide the arms 58 with counterbalancing weights 63 so arranged that the feed rolls will be held together so as to grip the tube.

The free end l,of the stud shaft 51 is journaled in a suitable bearing 64 mounted-ton the end of the intermediate section 45, as clearly shown in Fig. 8.

In order to provide means for revolving the tube, I arrange Within the intermediate section 45 of the drum a pair of gripping rollers 64 and 65 which are carried by shafts 66 'and 67 mounted in pivoted arms 68 carried by the end section 44 of the drum, the free ends of said shafts being connected together by coiled springs 69 so as to hold the feeding rollers in contact with the tube. These rolls are preferably provided with annular ribs so as to grip the tube and revolve the same. The shafts 66 and 67 are forced together by counterbalancing weightsJ 7|) carried by 'the arms l68 so asl to overcome centrifugal force as the drum is revolved ata high rate' of speed.

From the foregoing description it will be seen that the drumy is revolved through the medium of the gears 11 and 48,- and as the gripping rollers are carried byl members fixed in the drum they will be revolved with the drum so as to rotate the tube asthe same is fed by the feeding rollers which are driv en through the medium of the gears 35, 42,

43, 52, and Worm Wheels.

The tubular stem 47 of thedrum having the gear 48 at its free end carries a sleeve 72 which is provided with a beveled gear 73 vwhich in turn meshes with a beveled gear 74carried by a shaft 79 journaled in a sleeve pivotally mounted in the arm 75. The plaiting roller carried by thashaft 79 is rheld in mesh with the plaiting roller 78 by tensioning means 76 in the form of a spring heldin engagement with the pivoted sleeve in which the shaft 79 is mounted by an adjusting screw as clearly shown in Figure 22. f IThe sleeve 72 is internally threaded to receive a stem 77 of a plaiting roll 78, the face of which is fluted, as shown in Fig. 22. The gear 74 is fixed to the upper end of the shaft 79 and fixed on the lower end thereof is a plaiting roller 80 cooperating with the plaiting rolls 78, as clearly shown in Fig. 8, and between which a thin strip or ribbon 81 of sheet metal is adapted to be fed in such a manner that it will be plaitedj along its inner edge as shown in Fig. 27 so that when wound u on the tube as the Lsame passes through tIlJie plaiting roller 78, the metal will be taken up along its inner edge to compen sate for the difference in diameter of the inner and outer edges and to provide a bear-v ing surface or-attaching ed e whereby the extended radiator surface ormed thereby can be securely fixed' to the 'tube as will be hereinafter fully described. l x

The arm 17 carries a tank 83 adapted to contain acid, and the hub portlon 25 of the worm wheel mounted .in the bearing 26 carries at one end a disk 84 having curved tubes 85 secured thereto which are adapted to dip into the tank, the inner ends of the tubes being provided with brushes 86 for applying acid between the convolutions of the coils of the extended radiator surface as l the ytube is fed through the aperture of the disk, and it will beseen that as the disk 84 is rotated the tubes dip into the acid tank and pick up acid which is applied by the brushes to the surface of the tubev and plaited edge of the ribbon. Arranged between the disk 84 and around the hub 25 is a casing 87 adapted to receivethe surplus acid so that the same willy drain back intothe acid tank 83.

The other, end of the hub 25 of the worm 24 extends over a solder vat 88 'and has secured thereto a head member 89 which carries a pair of circular disks 90 connected together by semi-circular blades 91 which terminate adjacent an aperture 92 formed in each disk in such a manner thatas the same is rotated the semi-circular blades pick up solder out of the vat and feed it onto the iso 4 coils and tube of the radiator tube so as to completely coatthe surface thereof which causes the ribbon which has been wound spirally on the tube to be soldered to the tube as the same passes between the soldering device composed, of the spaced diskl and blades. The solder vat 88 has which has an inlet 93 and an outlet 94, the passage extending zig zag through the bottom wall thereof, as clearly shown in dotted lines in Fig. 2. An air pipe 95 connected to a suitable source of supply is con- .nected to the inlet 93, and an outlet pipe 96 is connected to the outlet 94, said outlet pipe being extended upwardly and terminating in a nozzle 97 whichis adapted to blow the surplus solder from the tube and extended radiating fiange, suitable means being provided for collecting the solder thus blown ofi'. A burner 98 is disposed under the vat so as to keep the solder heated to the proper temperature which enables the same to be applied continuously to the tube vas it passes through the machine.

The operation of themachine is as follows A tube of the desired diameter is forced through the tube guide between the feed rollers which grips the tube causing the same to move longitudinally and as the drum containing the feed and gripping rollers is beingrotated the tube is gripped by the gripping rollers and revolved. As the tube advances it passes through the lower plaiting roll, and as a strip of flat sheet metal is being fed between the plaiting rolls, the plaited strip is wound spirally around the tube with the plaited edge in contact therewith. The tube then passes through the acid applying brushes which are being rotated which applies the acid bath to the tube between the convolutions of the strip. The tube then passes through the soldering device where the entire surface of the tube and strip is given a coating off solder so that the paited edge is secured to the tube. The tube in leaving -the machine passes under the nozzle ofthe air pipe through which hot air is being forced so as to blow or remove the surplus solder. It will be seen that tubes of various lengths can be fed into the machine and a spiral radiating flange will beformed vthereon and the tube can be cutinto the desired length. to form radiator tubes after the same has passed through the machine, and in practice instead ofrunning sections of tube through the machine 'I preferablyconnect by a coupling member another section of tube to the end of the tube so that the machine runs continuously and a continuous extended radiator surface .is wound spirally around the tubemor secstrumentality, and the solder-applying instrumentalities are so located relative to each other and to the travelling tube, as to set up the` characteristics of individual and independent stations located successively in the path of travel of the tube, the operav r,tion at each station being individual toitformed in its bottom an air passage 92/ self, the work-performance at one station preparing the work for the activities at the succeeding station, the stations being ar- Jranged so that the work can travel continuously and with constant characteristic throughout the successive stations, enabling the use of a single mechanism for producing the work movement.

This is of advantage in that not only is handling eliminated in f transferring the work from one station to another and by 'the use of simple mechanism, but, in addition, the work performed at one station does not become affected by the activities at a succeeding station. For instance, should the fiux-applying station be located in advance of the strip-applying station, the applied flux is inherently affectedv inthe manipula` tion of the strip in applying the latter to its position, whether the flux be applied to the strip or to the tube; and such location locates the flux applying station far removed from the solder applying station, since the latter can be active only after the strip has been applied; and should the solder-applying station be in. immediate proximity to the strip applying station it becomes difficult to prevent the effects of heat application extending into the strip-a. plying station. By the arrangement emp oyed herein, the several activities take place on the tube in such relation and at such times as to ensure not only the proper positioning of the stripon the tube, but the flux will be applied at s'uch time as to present the coated Asurfaces to the soldering station with the flux at maximum eiciency to permit soldering to take place. yAnd the activities at the soldering station are such as to not only apply the solder in its-most efiicient manner-by flowing it i'n its fluid state under gravity action-but the surplus-removing activity takes place at such time as to practically prevent the soldering hardening and thus requiring reheating to permit removal.

One of the important features that permit this result are the activities in thestrippositioning station. As will be understood, the shaping of the strip to cause the latter to pass from a linear to a spiral form takes place as the strip practically reaches 'the tube, the shaping or plaiting mechanism itself performing the service of drawing the strip and placing it in position, so that',

there can be no drawing action placed upon that portion of the strip that was previously positloned when the strip is plaited, its relative position ontthe tube has been fixed and is not disturbed either by the plaiting of a succeeding portion of the strip or the succeeding activities that secure the positioned strip in position. This becomes of extreme importance under production conditions, since assurance is had that the product will'be uniform in characteristic as yto the form of the plaits and the position of the strip on the tube. Another great advantage that flows from this arrangement is the ability to employ plaiting elements that are especially designed to produce the proper plaiting action on the strip-the form of the plaits is not left to chance, but is predetermined and assurance is had that each plait will be similar to those that preceded it in applyingA the s-trip to the tube. l-And another advantage comes from the fact tlat by this arrangement it is Qssibleto apply a strip in such manner t at the outer edge of the strip, in applied position, may be free from any corrugated effect, thus setting up the conditions of an4 applied strip in which longitudinal zones of the strip have different characteristics-part corrugated and part uncorrugated and With the corrugations varying vin kaccordance with predetermined design. o

Because of this ability to deliver the tube with its positioned strip unaffected as to position, etc., it is possible. to employr the simple flux-applying and solder applying instrumentalties, each of a type adapted to provide for maximum efficiency in opera tion. And because of the efficiency of the `nstrumentafities at the successive. stations it is possible to set up a speed of travel of as to be uniform in characteristic both with` respect to the .individual unit and a succession of units.

Another advantage of this construction floiv's from the ability to produce tubes in continuous lengths. As Will be understood, it is possible to feed the tube b-lanksin immediate succession so that there is a contacting relation between successive tubes at the strip-positioning station, the stripthen simply passing from one to the other Without break and serving to unite the tubes icmporari'y While passing through the remaining stations; the tubes are then separated by simply cutting the strip at the proper point. 0r, if successive tubes are connected together, as heretofore pointed out, a succession of tubes can be united into a single length, and the latter then cut through the strip and tube to produce any desired product length, itbeing understood that the presence of the connection atan intermedif ate point in the length of the final iproduct Will not materially affect the operation of the latter in service.

From the foregoing description it Will be seen that I 'have provided a machine for Winding an extended radiator surface on a p'ain tube .and for securing said extended surface to the tube in one operation, and While I' have shown certain details of construction of the various parts I do not Wish to limit myself to these details. as my invention consists in providing, a machine having means for continuously feeding and rotating a tube in connection With means for plaiting a plain strip or ribbon of sheet metal which is Wound spirally around the tube by the rotation ofthe tube and then subjected to an acid bath and then to a solder bath Where it is rigidly attached to the tube.

What I claim as new is:

l. A continuous tube machine for making radiator tubes with extended radiating surfaces, comprising revolving and feeding means for continuously movlng and revolving a tube in its passage therethrough, means for Winding a strip of metal spirally thereon, and means for subjecting said tube and strip'to a soldering bath for securing said strip to said tube.

2. A continuous tube machine for making radiator tubes With extended radiating sur-I faces, comprising revolving and feeding` means for continuously moving and revolving a tube in its passage therethrough, means for Winding a strip of metal spirally thereon and simultaneously plaiting the inner edge of said strip, and meansA for subjecting Said tube and strip to a soldering bath for coating and securing said strip to said tube,

In a machine for making radiator tubes, the combination with means for continuously revolving yand moving a tube longitudinally, of means for plaiting the inner edge of a strip and concurrently therewith,

applying the same spirally on said tube by a Winding action, and 'means for'` soldering said'strip to said tube.

4. A machine for making radiator tubes comprising revolving "and feeding means for continuously revolving and feeding a tube in a defined path, a plaiting device arranged to plait the inner edge of a strip of metal and wind the same spirally on the tube passing through the machine and means for subjecting said tube and stnip to a soldering bath to secure saidstrip to\said tube.

5. A machine for making radiator tubes having extended radiating surfaces, comprising a/ vrevolu'ble drum having means for gripping and feeding the `tube in its passage therethrough, a pair of plaiting rolls arranged to plait' a strip of thin metal and spirally wind the same on said tube, and means for soldering said strip to said tube.

6. A machine of the kind described .comprising a revoluble drum having feeding and strip to a soldering bath forsecuring4 said strip to said tube.

7. A machine for making radiator tubes having extended radiating surfaces com- .I prising a revolving drum having a tube receiving end and a tube discharging end, means disposed in said drum for gripping the tube and rotating the-same in its passage therethrough, means for feeding the tube throughl said drum, means disposed at the discharge end of said drum for winding a strip of metal spirally on the tube, and means for soldering said strip-of metal to said tube.

8. A machine of the kind described comprising a revolubly mounted drum, means for rotating said drum, a pair of feed rollers disposed in said drum,`means for driving said feed rollers, a pair of gripping rollers disposed in said drum, said drum having a tube guide at one end through which the tube, passes, means disposed at the opposite end of said drum in the. path of travel of said tube for plaiting and simultaneously winding on said tube a strip of thin metal, means for applying acid to said :tube between the convolutions of said strip, and means for subjecting said tube and strip to a soldering bath for securing said strip to said tube.

'prising a revolving drum having means for revolving and feeding a tubular member therethrough, means disposed in the path of travel of the said tubular members for simultaneously pl aiting and winding a strip of .''thin metal thereon, and means for subject ing said strip and tube t a soldering bath for coating said tube and strip and for securing said strip and tube together.

11. A machine of the kind described comprising a revolubly mounted drum having an opening at one end to receive a tube and an opening at its opposite end to discharge a tube therefrom, means for feeding a tube therethrough and for simultaneously revolving said tube, means disposed at Ithe discharge end of said drum for plaiting and` simultaneously Winding a thin strip on the outer surface of said tube, means arranged in the path of travel of said tube for applying acid thereto, and means for soldering said strip of thin metal to said tube.

12.' A machine for continuously forming radiator tubes having extended radiating surfaces comprising means for revolving and feeding a tube longitudinally, means for Winding a strip of thin metal on said tube, means for applying acid to said' tube between the convolutions of said strip, means for subjecting said strip and tube to a soldering bath, and means for removing the surplus solderfrom said strip and said tube.

13. ln a machine of the kind described comprising a revolubly mounted drum-r geen ing for driving said drum, a pair of feed rollers disposed in said drum, means for driving said feed rollers, a pair of gripping rollers disposed in said drum in' alignment; with said feed rollers for revolving. the tube in its passage through said drum, means disposed in the path of travel of said tube for plaiting a thin strip of metal and simultaneously spirally winding said strip on said tube, and means disposed in the path of travel of said tube for subjecting said tube and strip to a soldering bath in its passage therethrough.

lll. machine of the kind described' coniprising a revolubly mounted drum having means for revolving the same, said drum having a tube receiving end and a tube discharging end, a pair of feed rollers disposed in said drum adapted to feed a tube through said drum, a pair of gripping rolls disposed in said' drum for gripping the tube and re-l volving the same with said drum, means for rotating said feed rollers, and means for applying and securingV to said tube a thin strip of metal to form an extended radiating sur race.

l5. A machine of the kind described comprising a revolubly mounted drum having'a passage for a tube, means disposed in s aid vdrum for gripping the tube for revolving the same with said drum, means disposed in said' drum for feeding a tube therethrough, means disposed in the path of travel of said tube at the discharge end of said drum for plaiting Iand simultaneously winding on said tube a thin strip of metal, means for applying to said tube and' strip acidnand means for subjecting said tube and strip to a soldering bath for securing said strip to said tube.

16. A machine of the kind described comprising a revolubly mounted drum having a tube receiving end and a tube discharging end, means disposed in said drum for feeding and simultaneously revolving a tube in its passage therethrough, means disposed 1n the path of travel of said tube for spirallv winding a strip of metal on the tube, a se- IUS said tube and strip together.

ries of brushes disposed in the path of travel of said.tube for applying acid to said tube between the convolutions of said strip, and a soldering device arranged in the path of travel of said tube for coating the surface of said tube and said strip and for soldering.

17, A machine of the kind assessed Qomprising a revolubly mounted drum having a tubular stem at each end, the stem at one end being provided with a tube` guide, gearing for revolving said drum, feed rollers disposed in said drum, gearing for revolving said feed rollers for feeding a tube therethrough, gripping rollers disposed in said drum and rotating therewithj for revolving the tube in its passage therethrough, and means for applying and securing a thin strip of metal to said ube for forming an extended radiating surace.

18. A machine of the kind described' comprising a revolubly mounted drum having a tubular stem at each end forming a passage' for a tube, the stem at one end of said drum being provided with a tube guide, a gear carried by the stem at the opposite end of said drum, a gear meshing with said gear for revolving s-aid drum, a pair -of gripping rollers disposed in said drum for gripping the tubeand rotatin the same with said drum, a pair of feeding rolls disposed in said drum for moving .the tube longitudinally through said drum, gearing for revolving said feed rolls, and means disposed in the path of travel of said tube through said machine for windingand' securing upon said tube a thin strip of metal for forming an extended radiating surface.

19. A machine of the kind described comprising a tubular drum, means for revolving said drum, means disposed, ini said drum for feeding a tube therethrough, means for I gripping the tubev and revolving the ctube with said drum, a pair of plaiting rolls disposed in the path of travel of said tube for plaiting the thin strip. of metal and simul.

' taneously winding said strip spiral'ly on` said tube, a series of revoluble brushes for applying acid to said tube between theconvolutiens thereof, and a. revolving soldering device for coating said tubeand strip with solder for securing said strip to said tube.

20. A machine 4for forming radiatortubes having extended radiatingsurfaces comprising means for revolving and feeding a tube l continuously through the machine, means for plaiting a thin strip of metal and simultaneously winding the same spirally on said tube on its passage through the machine, means for applying acid to said tube between the convolutions of said strip, and

means for subjecting said tube and strip to a soldering bath.

21. A machine of the kind described com-y prising a revolubly mounted drum having a said rum for revolving the tube in its passage therethrough, a sleeve surrounding the stem `at the opposite end of said .drum hav ing an external gear at one end and an internal gear at the opposite end, a gear meshing with theexternal gear for rotating said sleeve, a pair of feeding rollers disposed' in said drum carrying worm wheels, a stud shaft mounted in said drum carrying a Worm meshing with said worm wheels, a pinion carried by said, stud shaft meshing with the internal gear of said sleeve. and means for winding and securing a strip of thin metal to said tube in its passage through the machine for forming an extended radiat ing surface.

22. A machine' for forming radiator tubes comprising a revolubly mounted drum having means for revolving the same, feed rollers disposed in said drum having independ- 23. A machine of the kind described comprising a revolubly mounted drum having means disposed therein for feeding and revolving the tube in its passagetherethrough,

means disposed in the path of tra-vel of said tube for plaiting a thin strip of metal and simultaneously spirally Winding said strip on said tube,7 a series of revolving brushes disposedl in the path of travel of said tube for applying 4acid to said tube between the havingcounterbalancing weights for overcoming centrifugal force, said feeding means comprising a pair of spring actuated ico feeding rollers having counterbalancing p weights for overcoming centrifugal force.y means for Vdriving said drum for rotating said drum at one rate of' speed, and independent means for driving said feed rollers for revolving said rollers at adiferent rate of speed. f

25. Ina machine of the kind described comprising means for continuously/revolv- (itl ing and feeding a tube, means for continuously applying to said tube an extended radiating surface, means for applying acid to said tube between said extended radiating surface, and means for subecting said tube and kstrip to a soldering bath.

26. A machine for forming a continuous radiator' tube comprising means for continuously feeding and revolving ya tube, means for continuously applying to said tube a thin strip of metal and simultaneously plaiting said strip, a series of revolving brushes arranged in the path of travel of said tube for applying acid to said tube between the convolutions of said strip, a solder vat, a soldering device comprising a series of bladesfor dipping into said vat, means for revolving said soldering device for subjecting said tube and strip to a soldering bath, and means for blowing the surplus solder from said tube and strip.

2'?. A machine of the kind described having means for continuously revolving and moving longitudinally a tube and applying a thin strip of metal spirally thereto, means arranged in the path of travel for coating said strip and tube with solder, and means for blowing the surplussolder from said strip and tube.

28. A machine of the kind described comprising means :tor Winding a plaited strip of thin metal upon a tube, means for applying acid to said tube and strip, means for subjecting said tube and strip to a soldering bath, and means for removing the surplus solder from said strip and tube. Y

29. A machine ot the kind described having means for applying a strip of thin metal spirally to a tube, means disposed in the path of travel ot said tube for applying acid to said tube between the convolutions oi said strip, and a revolving soldering device arranged in the path of travel/ of said tube and through which said tube passes for coating Said tube and strip with solder.

30. A machine of the kind described comprising means :for continuously feeding and revolving a tube, 'means for plaiting and simultaneously Winding a thin strip of metal spirally on said tube, means disposed in the path of travel of said tube for applying acid to said tube between the convolutions of said strip, a soldering device for coating said strip and tube for securing said strip and tube together, and means for removing the surplus solder from said tube and strip.

31. A machine of the kind described comprising a revoluble member having means for continuously revolving and feeding a tube longitudinally therethrough, means dis-- posed in the path of travel or said tube for Winding a strip of thin metal spirally thereon, an acid tank, a disk carrying a series of curved tubularmembers mounted above said tank, said tubular members extending into said tank, brushes carried by the inner ends of said tubular members between which said tube passes, a soldering vat, a pair of revoluble disks extending into-said vat having curved blades terminating adjacent openings formed in said disk through which said tube passes, and a hot air nozzle arranged in the path of travel ot said tube for removing the surplus solder from said tube in its passage throu h said machine.v

32. A machine hof the kind .described comprising a revoluble drum having gripping means, means for revolving said drum, feeding means disposed in said drum, means 'for independently driving said feeding means, and means disposed in the path of travel of a tube through said drum for applying and securing a thin strip of metal to the surface thereof to form an extended radiating surface.

38. The methodof making radiator tubes which consists in setting a substantially continuous tubular member in rotary and longitudinal motion and while it is in motion and without interrupting such motion concurrently shapingl and positioning upon the outer surface thereof a thin strip of metal to form an extended radiating surface, the shaping and positioning activities being operative to change the strip from its linear form to a spirally-wound formation.

34. ln a machine for making radiator tubes, the combination with means for continuously revolving and moving a tube longitudinally, of means for plaiting the inner edge oit a strip and simultaneously winding the same spirally on said tube, a solder vat over which said tube is adapted to pass and a revolving soldering device mounted above said vat having passageway/s through which said tube is adapted to pass for elevating the solder from said vat and applying it to said tue and strip for securing said strip to said tu e.

35. A machine for making radiator tubes, the combination with means for continuously revolving and moving the tube longitudinally, of means for plaiting a strip and simultaneously winding the same spirally on said tube, a solder vat over which said tube is adapted to pass, a soldering device mounted above said vat comprising spaced apertured disks provided with blades, the

openings of said disks forming a passageway through which said tube is adapted to pass and means for revolving said disks.

A machine ofthe kind described comprising means for winding a plaited strip of thin mate-rial upon a tube, revolving means for applying acid to said tube and strip, a revolving soldering device arranged in the path of travel of said tubefor applying solder to `said strip and tube and means for removing the surplus solder from said strip and tube. l 

